Amicable pairs: Difference between revisions
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→{{header|Sidef}}: simplification: use the sigma function |
SqrtNegInf (talk | contribs) m →{{header|Perl 6}}: faster: concurrency & improved 'sum' routine |
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=={{header|Perl 6}}==
{{Works with|
<lang perl6>sub propdivsum (\x) {
my @l =
(2 .. x.sqrt.floor).map:
}
}
my $j = propdivsum($i);
say "$i $j" if $j > $i and $i == propdivsum($j);
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